RA/DEC (2000)
06:18:03.190 +78:22:01.16
94.513292 +78.366989
Type
SN II
Redshift
0.002979
Reporting Group
None
Discovering Data Source
None
Discovery Date
2018-03-02 11:40:16.000
TNS AT
Y
Public
Y
Host Name
NGC 2146
Discovery Mag
17.8
Filter
Clear-
Reporter/s
Koichi Itagaki

Spectra

 SN_2018zd - 2019-04-04 06:28:48 Keck1 / LRIS (None)z=
 SN_2018zd - 2019-02-02 14:52:48 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-12-10 09:36:00 APO-3.5m / DIS (None)z=
 SN_2018zd - 2018-11-04 04:19:12 APO-3.5m / DIS (None)z=
 SN_2018zd - 2018-03-15 16:19:12 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-13 14:52:48 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-11 16:19:12 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-10 13:40:47 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-09 17:02:24 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-07 16:33:35 Lijiang-2.4m / YFOSC (None)z=
 SN_2018zd - 2018-03-06 08:57:00 FTN / FLOYDS-N (Global SN Project)z=
 SN_2018zd - 2018-03-06 03:41:17 P60 / SEDM (ZTF)z=
 SN_2018zd - 2018-03-06 03:41:17 P60 / SEDM (ZTF)z=
 SN_2018zd - 2018-03-05 17:45:36 Lijiang-2.4m / YFOSC (None)z=
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Show Tellurics 
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 Gaia_Gaia-photometric_G
 ATLAS-MLO_ATLAS-01_orange
 ATLAS-HKO_ATLAS-02_orange
 Other_Other_R
 Other_Other_Clear
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
9933 2019-04-04 06:28:48 Keck1 / LRIS AVF None tns_2018zd_2458577.77_Keck1_LRIS.dat Object 2021-06-27
9936 2019-02-02 14:52:48 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458517.12_Lijiang-2.4m_YFOSC.dat Object 2021-07-13
9934 2018-12-10 09:36:00 APO-3.5m / DIS XFW None tns_2018zd_2458462.90_APO-3.5m_DIS.dat Object 2021-06-20
9935 2018-11-04 04:19:12 APO-3.5m / DIS XFW None tns_2018zd_2458426.68_APO-3.5m_DIS.dat Object 2021-09-07
9932 2018-03-15 16:19:12 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458193.18_Lijiang-2.4m_YFOSC.dat Object 2021-07-19
9931 2018-03-13 14:52:48 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458191.12_Lijiang-2.4m_YFOSC.dat Object 2021-07-13
9930 2018-03-11 16:19:12 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458189.18_Lijiang-2.4m_YFOSC.dat Object 2021-07-19
9929 2018-03-10 13:40:47 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458188.07_Lijiang-2.4m_YFOSC.dat Object 2021-07-08
9927 2018-03-09 17:02:24 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458187.21_Lijiang-2.4m_YFOSC.dat Object 2021-07-22
9928 2018-03-07 16:33:35 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458185.19_Lijiang-2.4m_YFOSC.dat Object 2021-06-23
1768 2018-03-06 08:57:00 FTN / FLOYDS-N 3600 Robotic G. Hosseinzadeh Global SN Project tns_2018zd_2018-03-06_08-57-00_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2018zd_2018-03-06_08-57-00_FTN_FLOYDS-N_Global_SN_Project.fits Object
1766 2018-03-06 03:41:17 P60 / SEDM 2700 Walters/Neill/Blagorodnova Neill ZTF tns_2018zd_2018-03-06_03-41-17_P60_SED-Machine_ZTF_0.txt Object re-upload to change classification
1765 2018-03-06 03:41:17 P60 / SEDM 2700 Walters/Neill/Blagorodnova Neill ZTF tns_2018zd_2018-03-06_03-41-17_P60_SED-Machine_ZTF.txt Object
7471 2018-03-05 17:45:36 Lijiang-2.4m / YFOSC Jujia Zhang (YNAO) None tns_2018zd_2018-03-05.74_Lijiang-2.4m_YFOSC.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
G-Gaia Gaia_Gaia-photometric 2018-02-11 20:16:48 - 2018-03-05 08:09:36 2458161.345 - 2458182.84 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
25882 2018-03-05 08:09:36 2458182.84 14.84 0.2 ABMag G-Gaia Gaia_Gaia-photometric 60 Robot
25881 2018-02-11 20:16:48 2458161.345 21.5 ABMag G-Gaia Gaia_Gaia-photometric Robot [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2018-02-21 10:39:21 - 2018-02-21 10:39:21 2458170.9439931 - 2458170.9439931 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
25953 2018-02-21 10:39:21 2458170.9439931 18.51 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2018-03-07 05:58:33 - 2018-03-07 05:58:33 2458184.7489931 - 2458184.7489931 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
25954 2018-03-07 05:58:33 2458184.7489931 14.229 0.007 19.42 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
R-Cousins Other_Other 2018-03-10 10:56:00 - 2018-03-10 10:56:00 2458187.9555556 - 2458187.9555556 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
25990 2018-03-10 10:56:00 2458187.9555556 13.7 VegaMag R-Cousins Other_Other F.Watanabe 0.4-m f/10 Meili telescope (Meade Schmidt-Cassegrain telescope) + CCD (SBIG STL-1001E) at Nayoro Observatory
Clear- Other_Other 2018-03-02 11:40:16 - 2018-03-26 10:59:21 2458179.9862963 - 2458203.9578819 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
38851 2018-03-26 10:59:21 2458203.9578819 14 18 VegaMag Clear- Other_Other 20 t.noguchi 0.23-m f/10
38850 2018-03-02 13:18:11 2458180.054294 17.8 VegaMag Clear- Other_Other 0.23-m /f10
25763 2018-03-02 11:40:16 2458179.9862963 17.8 VegaMag Clear- Other_Other K.Itagaki 0.5-m f6.8
25989 2018-03-02 11:40:16 2458179.9862963 17.8 VegaMag Clear- Other_Other
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
24147 2018-11-07 04:47:00 Toshihide Noguchi Toshihide Noguchi et al. 06:18:03.300 +78:22:01.00 2018-03-26 10:59:21.000 14 Clear- PSN Follow up report N
24146 2018-11-07 04:18:09 Toshihide Noguchi Toshihide Noguchi et al. 06:18:03.350 +78:22:01.10 2018-03-02 13:18:11.000 17.8 Clear- PSN N
17215 2018-03-10 12:45:12 Fumitake Watanabe Fumitake Watanabe et al. 06:18:03.180 +78:22:00.90 2018-03-02 11:40:16.000 17.8 Clear- PSN N
Related files
File Comments Last Modified (UT) Modified By
tns_2018zd_atrep_17215.jpg 2018-03-18 08:03:16 Fumitake Watanabe
17198 2018-03-09 12:00:02 ATLAS_Bot1 J. Tonry,B. Stalder,L. Denneau et al. ATLAS ATLAS 06:18:03.213 +78:22:01.00 2018-03-07 05:58:33.000 14.229 orange-ATLAS PSN ATLAS18mix ATLAS N
17158 2018-03-07 12:17:20 Gaia_Bot1 A. Delgado,D. Harrison,S. Hodgkin et al. GaiaAlerts GaiaAlerts 06:18:03.190 +78:22:01.16 2018-03-05 08:09:36.000 14.84 G-Gaia PSN Gaia18anr GaiaAlerts bright confirmed SN IIn near galaxy NGC2146, aka SN2018zd N
17089 2018-03-02 12:42:43 Koichi Itagaki Koichi Itagaki et al. 06:18:03.180 +78:22:00.90 2018-03-02 11:40:16.000 17.8 Clear- PSN NGC 2146 2018TNSTR.285....1I N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
9919 2021-06-21 07:48:59 Jujia Zhang Jujia Zhang None SN II 10 2021TNSCR2151....1Z
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
9933 2019-04-04 06:28:48 Keck1 / LRIS AVF None tns_2018zd_2458577.77_Keck1_LRIS.dat Object 2021-06-27
9936 2019-02-02 14:52:48 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458517.12_Lijiang-2.4m_YFOSC.dat Object 2021-07-13
9934 2018-12-10 09:36:00 APO-3.5m / DIS XFW None tns_2018zd_2458462.90_APO-3.5m_DIS.dat Object 2021-06-20
9935 2018-11-04 04:19:12 APO-3.5m / DIS XFW None tns_2018zd_2458426.68_APO-3.5m_DIS.dat Object 2021-09-07
9932 2018-03-15 16:19:12 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458193.18_Lijiang-2.4m_YFOSC.dat Object 2021-07-19
9931 2018-03-13 14:52:48 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458191.12_Lijiang-2.4m_YFOSC.dat Object 2021-07-13
9930 2018-03-11 16:19:12 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458189.18_Lijiang-2.4m_YFOSC.dat Object 2021-07-19
9929 2018-03-10 13:40:47 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458188.07_Lijiang-2.4m_YFOSC.dat Object 2021-07-08
9927 2018-03-09 17:02:24 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458187.21_Lijiang-2.4m_YFOSC.dat Object 2021-07-22
9928 2018-03-07 16:33:35 Lijiang-2.4m / YFOSC Jujia Zhang None tns_2018zd_2458185.19_Lijiang-2.4m_YFOSC.dat Object 2021-06-23
7458 2020-09-14 01:39:50 Jujia Zhang Jujia Zhang (YNAO) None SN II 0.002979 1 A spectrum from LJT shows short-lived flash features. The light curve of SN 2018zd locates between SNe IIP and IIL. 2020TNSCR2798....1Z
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
7471 2018-03-05 17:45:36 Lijiang-2.4m / YFOSC Jujia Zhang (YNAO) None tns_2018zd_2018-03-05.74_Lijiang-2.4m_YFOSC.dat Object
1763 2018-03-06 19:21:14 Iair Arcavi Iair Arcavi, Griffin Hosseinzadeh, Daichi Hiramatsu, Curtis McCully, D. Andrew Howell, Jaime Burke (UCSB/LCO) Global SN Project SN II 0.002979 1 Global SN Project We report a FLOYDS spectrum obtained on 2018-03-06.4 UT with the robotic FLOYDS instrument mounted on the Las Cumbres Observatory 2-meter telescope on Haleakala, Hawai'i, in order to correct a previous classification of this object as a Type Ia-CSM supernova. The added resolution of the FLOYDS data compared to the spectrum reported previously clearly reveals the presence of narrow Balmer H emission lines atop a blue continuum, consistent with a young Type II supernova. Additional narrow emission features include He II 4686A and 5411A, C III 4648A, C IV 5801A, O III 3713A and 3749A, and possibly N III 4640A, similar to those seen in very early "flash spectra" of young Type II supernovae (e.g. Gal-Yam et al. 2014, Nature, 509, 471; Khazov et al. 2016, ApJ, 818, 3; Hosseinzadeh et al. 2018, arXiv: 1801.00015), and in early spectra of the peculiar Type II SN 1998S (e.g. Shivvers et al. 2015, ApJ, 806, 213). It is therefore still too early to classify this event as a Type IIn supernova (or as any other subcategory of the Type II class). 2018TNSCR2082....1A
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1768 2018-03-06 08:57:00 FTN / FLOYDS-N 3600 Robotic G. Hosseinzadeh Global SN Project tns_2018zd_2018-03-06_08-57-00_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2018zd_2018-03-06_08-57-00_FTN_FLOYDS-N_Global_SN_Project.fits Object
1761 2018-03-06 14:56:29 James Neill James Neill ZTF SN IIn 0.002 1 ZTF Classification provided by Saurab Jha from SNID fit to SN1998S at -13 days 2018TNSCR2083....1N
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1766 2018-03-06 03:41:17 P60 / SEDM 2700 Walters/Neill/Blagorodnova Neill ZTF tns_2018zd_2018-03-06_03-41-17_P60_SED-Machine_ZTF_0.txt Object re-upload to change classification
1760 2018-03-06 05:49:56 James Neill James Neill ZTF SN Ia-CSM 0.003 1 ZTF SNID match to SN2005gj at +10 days 2018TNSCR.307....1N
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1765 2018-03-06 03:41:17 P60 / SEDM 2700 Walters/Neill/Blagorodnova Neill ZTF tns_2018zd_2018-03-06_03-41-17_P60_SED-Machine_ZTF.txt Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 17158 of Group GaiaAlerts
Previous RA, DEC: 06:18:03.180, +78:22:00.90 (94.51325, +78.366917)
Updated RA, DEC: 06:18:03.190, +78:22:01.16 (94.513292, 78.366989)

Ofer
Yaron

This is not a Ia-CSM

but a type II Core-Collapse SN. 

Patrick
Wiggins

Earlier image

Image was taken 2018-03-02 at 02:24:37, about 9.5 hours before the discovery image. Limiting magnitude was about 18.5. No apparent sign of anything new at that time.